Illumination device with light falloff compensation function and method thereof

Abstract

To provide a lighting device with a light falloff compensation function, and a method thereof.SOLUTION: A lighting device with a light falloff compensation function includes a plurality of light-emitting modules, a storage module, a driving module, an illuminance detection module, and a control module. The storage module stores an initial illuminance value of a preset position, and has a preset distance between the preset position and the plurality of light-emitting modules. The driving module generates a driving current to drive one of the plurality of light-emitting modules. The illuminance detection module detects a current illuminance value of a target position, and has a preset distance between the target position and the plurality of light-emitting modules. The control module receives the current illuminance value and executes a light falloff compensation mode. The control module compares the initial illuminance value and the current illuminance value in the light falloff compensation mode to obtain the amount of light falloff, and compensates for the amount of light falloff by increasing the driving current to increase the current illuminance value until the current illuminance value is equal to the initial illuminance value.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a lighting device, and in particular to a lighting device with a light falloff compensation function. The present invention also relates to a light falloff compensation method for use in a lighting device. [Background technology]

[0002] Light-emitting diode lighting devices have the advantages of low power consumption, long life, high brightness, and environmental protection, and are therefore widely applied in various buildings. However, conventional light-emitting diode lighting devices still have many shortcomings that need to be improved. For example, the light attenuation of conventional light-emitting diode lighting devices becomes increasingly serious with the increase in usage time. In addition, conventional light-emitting diode lighting devices with light attenuation compensation functions usually detect the light attenuation of the light-emitting diode and increase the driving current according to the light attenuation to perform illuminance compensation. However, increasing the driving current also increases power consumption, resulting in energy waste. Some conventional light-emitting diode lighting devices with light attenuation compensation functions detect the change in illuminance inside the globe to perform illuminance compensation. However, as the usage time increases, the light transmittance of the globe of the light-emitting diode lighting device also changes. The conventional light attenuation compensation function cannot effectively compensate for the light attenuation phenomenon caused by the change in the light transmittance of the globe.

[0003] Although China Patent Application Publication No. 113597041, China Patent Application Publication No. 115426735 and U.S. Patent No. 10506687 all disclose light attenuation compensation technologies, they still cannot effectively solve the above-mentioned technical problems in the prior art. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] China Patent Application Publication No. 113597041 [Patent Document 2] China Patent Application Publication No. 115426735 [Patent Document 3] U.S. Pat. No. 10,506,687 Summary of the Invention [Problem to be solved by the invention]

[0005] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a lighting device and method with light falloff compensation function. [Means for solving the problem]

[0006] According to an embodiment of the present invention, a lighting device with a light attenuation compensation function is provided, which includes a plurality of light-emitting modules, a storage module, a driving module, an illuminance detection module, and a control module. The storage module stores an initial illuminance value of a preset position, and has a preset distance between the preset position and the plurality of light-emitting modules. The driving module generates a driving current for driving one of the plurality of light-emitting modules. The illuminance detection module detects a current illuminance value of a target position, and has a preset distance between the target position and the plurality of light-emitting modules. The control module receives the current illuminance value and executes a light attenuation compensation mode. In the light attenuation compensation mode, the control module compares the initial illuminance value with the current illuminance value to obtain a light attenuation amount, and compensates for the light attenuation amount by increasing the driving current to increase the current illuminance value until the current illuminance value is equal to the initial illuminance value.

[0007] In one embodiment, the control module periodically executes the light falloff compensation mode.

[0008] In one embodiment, the storage module further stores a preset maximum drive current for each light-emitting module, and the control module enters a switching mode when the drive current exceeds the preset maximum drive current, and switches the drive module to another light-emitting module in the switching mode.

[0009] In one embodiment, the control module executes the light falloff compensation mode again after executing the switching mode.

[0010] In one embodiment, the lighting device further includes a communication module for receiving and transmitting a current illuminance value to the control module.

[0011] According to another embodiment of the present invention, there is provided a light attenuation compensation method for a lighting device, comprising: storing an initial illuminance value of a preset position by a storage module, and having a preset distance between the preset position and a plurality of light-emitting modules by a driving module; detecting a current illuminance value of a target position by an illuminance detection module, and having a preset distance between the target position and the plurality of light-emitting modules by a control module; receiving the current illuminance value by a control module, performing a light attenuation compensation mode, comparing the initial illuminance value and the current illuminance value to obtain an amount of light attenuation, and compensating for the amount of light attenuation by increasing the driving current to increase the current illuminance value until the current illuminance value is equal to the initial illuminance value.

[0012] In one embodiment, the light falloff compensation method further includes periodically executing a light falloff compensation mode by the control module.

[0013] In one embodiment, the method further includes storing a preset maximum driving current of each light-emitting module by a storage module, and when the driving current exceeds the preset maximum driving current, entering a switching mode by the control module to switch the driving module to another light-emitting module.

[0014] In one embodiment, the light falloff compensation mode is executed again after the switching mode is executed by the control module.

[0015] In one embodiment, the steps of receiving the current illuminance value by the control module, performing a light attenuation compensation mode to compare the initial illuminance value with the current illuminance value to obtain the light attenuation, and compensating for the light attenuation by increasing the current illuminance value by increasing the drive current until the current illuminance value is equal to the initial illuminance value further include receiving the current illuminance value by a communication module and sending it to the control module. Effect of the Invention

[0016] Based on the above, the lighting device with light falloff compensation function and the method thereof according to the embodiments of the present invention may have one or more of the following advantages. (1) In one embodiment of the present invention, a lighting device includes a plurality of light-emitting modules, a storage module, a driving module, an illuminance detection module, and a control module. The storage module stores an initial illuminance value of a target position. The driving module generates a driving current for driving one of the plurality of lighting devices. The illuminance detection module detects a current illuminance value of the target position. The control module can execute a light attenuation compensation mode. When the control module executes the light attenuation compensation mode, the control module compares the initial illuminance value with the current illuminance value to obtain the light attenuation amount, and increases the driving current to increase the current illuminance value to compensate for the light attenuation amount. The above-mentioned light attenuation compensation function can effectively compensate for the light attenuation amount of the lighting device, so that the current illuminance value of the target position can be always kept constant, and the lighting device can meet the requirements of practical applications. (2) In one embodiment of the present invention, the lighting device can detect the current illuminance value of the target position through the external illuminance detection module, and execute the light attenuation compensation mode through the control module. Therefore, even if the light transmittance of the globe of the lighting device is reduced, the above-mentioned light attenuation compensation function can still effectively compensate the light attenuation amount of the lighting device. Therefore, the application of the lighting device can be made more extensive and can better meet the requirements of actual applications. (3) In one embodiment of the present invention, the lighting device includes a plurality of light-emitting modules, and can execute a switching mode when the driving current exceeds the preset maximum driving current by the control module. When the control module executes the switching mode, the control module switches the driving module to another light-emitting module to drive the light-emitting module. Through the above-mentioned power-saving switching mechanism, the power consumption of the lighting device is not increased due to the light attenuation compensation function, so that the lighting device can be more energy-saving and can be adapted to future development trends. (4) In one embodiment of the present invention, the lighting device includes a plurality of light-emitting modules, and the control module can execute a switching mode when the driving current exceeds a preset maximum driving current. When the control module executes the switching mode, the control module switches the driving module to another light-emitting module to drive the light-emitting module. The above-mentioned power-saving switching mechanism can not only avoid the increase in power consumption of the lighting device, but also effectively extend the service life of the lighting device. (5) In one embodiment of the present invention, the lighting device can execute the light attenuation compensation mode again after executing the switching mode, so that the current illuminance value of the target position can be always kept constant, thus providing a good user experience. (6) In the present invention, the lighting device is designed simply, so that the desired effect can be achieved without significantly increasing costs. [Brief description of the drawings]

[0017] [Figure 1] FIG. 1 is a block diagram of a lighting device with a light falloff compensation function according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a block diagram of a lighting device with light falloff compensation function according to another embodiment of the present invention. [Diagram 3] 4 is a flowchart of a light falloff compensation method for a lighting device according to another embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] In the following embodiments, detailed features and advantages of the present invention are described, the contents of which are sufficient to enable those skilled in the art to understand the technical contents of the present invention and implement them accordingly, and the disclosure contents, claims and drawings in this specification enable those skilled in the art to easily understand the objectives and advantages of the present invention.

[0019] Hereinafter, the embodiment of the lighting device with light attenuation compensation function and the method thereof of the present invention will be described with reference to the related drawings. For the sake of clarity and ease of description in the drawings, the dimensions and ratios of each member in the drawings may be exaggerated or reduced. In the following description and / or claims, when a member is described as being "connected" or "coupled" to another member, it may be directly connected or coupled to the other member, or an intermediate member may be present. When a member is described as being "directly connected" or "directly coupled" to another member, there is no intermediate member, and other terms for describing the relationship between members or layers should be interpreted in the same manner. For ease of understanding, the same members in the following embodiments will be described with the same reference numerals.

[0020] 1 is a block diagram of a lighting device with a light attenuation compensation function according to an embodiment of the present invention. As shown in the figure, the lighting device 1 includes a plurality of light-emitting modules 15, a memory module 12, a driving module 14, an illuminance detection module 13 and a control module 11.

[0021] The plurality of light-emitting modules 15 are connected to a driving module 14. In this embodiment, the lighting device 1 has three light-emitting modules 15 (only two light-emitting modules 15 are shown in the figures). In one embodiment, the light source of the light-emitting module 15 may be a light-emitting diode (LED), a light-emitting diode array, a fluorescent lamp, a light bulb, or other similar components.

[0022] The driving module 14 generates an initial driving current for driving one of the three light-emitting modules 15. Therefore, only one light-emitting module 15 is in an ON state, and the other two light-emitting modules 15 are in an OFF state. In one embodiment, the driving module 14 is a light-emitting diode driver or other conventional light source driver.

[0023] The control module 11 is connected to the drive module 14 and controls the drive module 14 to generate a drive current. In one embodiment, the control module 11 may be a microcontroller (MCU), a central processing unit (CPU), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other similar components.

[0024] The storage module 12 stores an initial illuminance value of a preset position. There is a preset distance between the preset position and the plurality of light-emitting modules 15. The preset distance can be set according to actual needs, such as 1 meter, 2 meters, 3 meters, etc. Therefore, the storage module 12 can also store a plurality of initial illuminance values ​​respectively corresponding to different preset distances. The initial illuminance value can be set by the manufacturer of the lighting device 1 and stored in the storage module 12. In one embodiment, the storage module 12 can be a flash memory, a memory card, or other similar member.

[0025] The illuminance detection module 13 is installed at or near the target position and can detect the current illuminance value of the target position. There is also a preset distance between the target position and the plurality of light-emitting modules 15. In one embodiment, the illuminance detection module 13 can be an illuminance sensor, a light sensor, a lux meter, or other similar components.

[0026] Here, the control module 11 can receive the current illuminance value from the illuminance detection module 13 and execute the light attenuation compensation mode. When the control module 11 executes the light attenuation compensation mode, the control module 11 compares the initial illuminance value with the current illuminance value to obtain the amount of light attenuation.

[0027] Then, the control module 11 controls the driving module 14 to generate a compensation current according to the amount of optical attenuation, and increases the driving current output to the light-emitting module 15, thereby increasing the current illuminance value. When the current illuminance value is equal to the initial illuminance value, the control module 11 controls the driving module 14 to stop increasing the driving current output to the light-emitting module 15. Through the above-mentioned optical attenuation compensation mode, the control module 11 can effectively compensate for the amount of optical attenuation. The control module 11 can periodically execute the optical attenuation compensation mode to ensure that the current illuminance value of the target position always remains constant.

[0028] From the above, it can be seen that the lighting device 1 can detect the current illuminance value of the target position through one external illuminance detection module 13, and execute the light attenuation compensation mode through the control module 11. Therefore, even if the light transmittance of the globe of the lighting device 1 decreases, the light attenuation amount of the lighting device 1 can still be effectively compensated for by the above-mentioned light attenuation compensation function.

[0029] In addition, a user can connect to the lighting device 1 via an electronic device (such as a smartphone, a tablet PC, a notebook computer, etc.) and adjust the above-mentioned initial illuminance value through a corresponding application program to meet the user's requirements.

[0030] In addition, the memory module 12 can also store a preset maximum driving current of each light-emitting module 15. The preset maximum driving current can be provided by the manufacturer and calculated based on the photoelectric parameters of the lighting device 1. When the control module 11 determines that the driving current exceeds the preset maximum driving current, it enters the switching mode. When the control module 11 executes the switching mode, the control module 11 controls the driving module 14 to switch the driving module 14 to another light-emitting module 15 and drive the light-emitting module 15 with an initial driving current. Then, the control module 11 can execute the light attenuation compensation mode again after executing the switching mode, to ensure that the current illuminance value of the target position always remains constant.

[0031] From the above, it can be seen that the control module 11 can execute the light attenuation compensation mode, compare the initial illuminance value with the current illuminance value to obtain the light attenuation, and increase the driving current to increase the current illuminance value to compensate for the light attenuation. Through the above light attenuation compensation function, the light attenuation of the lighting device 1 can be effectively compensated, so that the current illuminance value of the target position can always be kept constant, and the lighting device 1 can meet the needs of practical applications.

[0032] In addition, when the driving current exceeds the preset maximum driving current, the control module 11 can execute a switching mode to switch the driving module 14 to another light-emitting module 15 to drive the light-emitting module 15. Through the above-mentioned power-saving switching mechanism, the power consumption of the lighting device 1 is not increased by the light attenuation compensation function, so that the lighting device 1 can be more energy-saving and can be adapted to the future development trend. At the same time, the above-mentioned power-saving switching mechanism can also extend the service life of the lighting device 1. In addition, the lighting device 1 can execute the light attenuation compensation mode again after executing the switching mode, so that the current illuminance value of the target position can always be kept constant. Therefore, the lighting device 1 can provide a good usage experience.

[0033] Of course, this embodiment is only used for illustrative purposes and does not limit the scope of the present invention, and any equivalent modifications or changes made based on the lighting device 1 with light attenuation compensation function of this embodiment should still fall within the protection scope of the present invention.

[0034] In addition, the light attenuation of the conventional light-emitting diode lighting device becomes more and more serious with the increase of the usage time. In addition, the conventional light-emitting diode lighting device with the light attenuation compensation function usually detects the light attenuation of the light-emitting diode and performs illuminance compensation by increasing the driving current according to the light attenuation. However, increasing the driving current also increases the power consumption, resulting in energy waste. Some of the conventional light-emitting diode lighting devices with the light attenuation compensation function detect the illuminance change inside the globe and perform illuminance compensation. However, as the usage time increases, the light transmittance of the globe of the light-emitting diode lighting device also changes. The conventional light attenuation compensation function cannot effectively compensate for the light attenuation phenomenon caused by the change of the light transmittance of the globe. In contrast, according to an embodiment of the present invention, the lighting device includes a plurality of light-emitting modules, a storage module, a driving module, an illuminance detection module, and a control module. The storage module stores an initial illuminance value of the target position. The driving module generates a driving current for driving one of the plurality of lighting devices. The illuminance detection module detects the current illuminance value of the target position. The control module can execute the light attenuation compensation mode. When the control module executes the light attenuation compensation mode, the control module obtains the light attenuation by comparing the initial illuminance value with the current illuminance value, and increases the driving current to increase the current illuminance value to compensate for the light attenuation. Through the above-mentioned light attenuation compensation function, the light attenuation of the lighting device can be effectively compensated, so that the current illuminance value of the target position can be always kept constant, and the lighting device can meet the requirements of practical applications.

[0035] According to the embodiment of the present invention, the lighting device can detect the current illuminance value of the target position through the external illuminance detection module, and execute the light attenuation compensation mode through the control module. Therefore, even if the light transmittance of the globe of the lighting device is reduced, the above-mentioned light attenuation compensation function can still effectively compensate the light attenuation amount of the lighting device. Therefore, the application of the lighting device can be more extensive and can better meet the requirements of practical applications.

[0036] In addition, according to an embodiment of the present invention, a lighting device includes a plurality of light-emitting modules, and when the driving current exceeds the preset maximum driving current by the control module, the control module can execute a switching mode. When the control module executes the switching mode, the control module switches the driving module to another light-emitting module to drive the light-emitting module. Through the above-mentioned power-saving switching mechanism, the power consumption of the lighting device is not increased by the light attenuation compensation function, so that the lighting device can be more energy-saving and can meet the future development trend.

[0037] In addition, according to an embodiment of the present invention, a lighting device includes a plurality of light-emitting modules, and a control module can execute a switching mode when the driving current exceeds a preset maximum driving current. When the control module executes the switching mode, the control module switches the driving module to another light-emitting module to drive the light-emitting module. The above-mentioned power-saving switching mechanism can not only avoid the increase in power consumption of the lighting device, but also effectively extend the service life of the lighting device.

[0038] According to an embodiment of the present invention, the lighting device can execute the light attenuation compensation mode again after executing the switching mode, so that the current illuminance value of the target position can be always kept constant, and therefore the lighting device can provide a good user experience.

[0039] Moreover, according to the embodiment of the present invention, the design of the lighting device is simple, so that the desired effect can be achieved without significantly increasing the cost. From the above, it can be seen that the lighting device with light attenuation compensation function according to the embodiment of the present invention can indeed achieve excellent technical effects.

[0040] 2 is a block diagram of a lighting device with a light attenuation compensation function according to another embodiment of the present invention. As shown in the figure, the lighting device 1 includes a plurality of light-emitting modules 15, a memory module 12, a driving module 14, an illuminance detection module 13 and a control module 11.

[0041] Unlike the previous embodiment, the lighting device 1 of this embodiment further includes a communication module 16. The communication module 16 can communicate with the illuminance detection module 13 based on a communication protocol, and the illuminance detection module 13 receives and transmits a current illuminance value to the control module 11. In one embodiment, the communication module 16 can be an antenna or other conventional signal transmitting and receiving circuit. In one embodiment, the communication protocol can be Bluetooth, Zigbee, WiFi, or other conventional communication protocol.

[0042] Similarly, the control module 11 can receive a current illuminance value from the illuminance detection module 13 via the communication module 16 and execute the light attenuation compensation mode. When the control module 11 executes the light attenuation compensation mode, the control module 11 compares the initial illuminance value with the current illuminance value to obtain the amount of light attenuation.

[0043] Then, the control module 11 calculates the compensation current according to the amount of optical attenuation. Then, the control module 11 controls the driving module 14 to increase the driving current output to the light-emitting module 15 according to the compensation current, and increase the current illuminance value. When the current illuminance value is equal to the initial illuminance value, the control module 11 controls the driving module 14 to stop increasing the driving current output to the light-emitting module 15. Through the above-mentioned optical attenuation compensation mode, the control module 11 can effectively compensate the amount of optical attenuation. The control module 11 can periodically execute the optical attenuation compensation mode to ensure that the current illuminance value of the target position always remains constant.

[0044] Of course, this embodiment is only used for illustrative purposes and does not limit the scope of the present invention, and any equivalent modifications or changes made based on the lighting device 1 with light attenuation compensation function of this embodiment should still fall within the protection scope of the present invention.

[0045] 3 is a flow chart of a light attenuation compensation method for a lighting device in another embodiment of the present invention, and please refer to FIG. 2 in conjunction with FIG. 3. As shown in the figure, the light attenuation compensation method for the lighting device 1 in this embodiment includes the following steps: Step S31: storing an initial illuminance value of a preset position by a storage module, and having a preset distance between the preset position and the plurality of light-emitting modules. Step S32: Generate a driving current by a driving module to drive one of the multiple lighting devices. Step S33: Detect a current illuminance value of the target position by the illuminance detection module, and have a preset distance between the target position and the multiple light-emitting modules. Step S34: The control module receives the current illuminance value through the communication module, executes a light attenuation compensation mode, compares the initial illuminance value with the current illuminance value to obtain the light attenuation amount, and compensates for the light attenuation amount by increasing the driving current to increase the current illuminance value until the current illuminance value is equal to the initial illuminance value. Step S35: Periodically execute the light attenuation compensation mode via the control module. Step S36: When the driving current exceeds the preset maximum driving current, the control module enters a switching mode to switch the driving module to another light-emitting module. Step S37: After executing the switching mode, the control module executes the light attenuation compensation mode again.

[0046] According to the above method, the light attenuation of the lighting device 1 can be effectively compensated, so that the current illuminance value of the target position can be always kept constant, and the lighting device 1 can meet the needs of actual applications. Furthermore, the lighting device 1 can detect the current illuminance value of the target position through the external illuminance detection module 13, and execute the light attenuation compensation mode through the control module 11. Therefore, even if the light transmittance of the globe of the lighting device 1 is reduced, the light attenuation of the lighting device 1 can be effectively compensated through the above-mentioned light attenuation compensation function. Therefore, the application of the lighting device 1 can be made more extensive and the needs of actual applications can be better met. Moreover, according to the above method, the power consumption of the lighting device 1 is not increased due to the light attenuation compensation function, so that the lighting device 1 can be made more energy-saving and can be adapted to the future development trend.

[0047] Of course, this embodiment is only used for illustrative purposes and does not limit the scope of the present invention, and any equivalent modifications or changes made based on the light attenuation compensation method of the lighting device 1 of this embodiment should still fall within the protection scope of the present invention.

[0048] Although the steps of the methods described herein are shown and described in a particular order, the order of operations of each method may be changed, some steps may be performed in reverse order or simultaneously with other steps, and in alternative embodiments, different steps may be performed intermittently and / or alternatingly.

[0049] In summary, according to an embodiment of the present invention, a lighting device includes a plurality of light-emitting modules, a storage module, a driving module, an illuminance detection module and a control module. The storage module stores an initial illuminance value of a target position. The driving module generates a driving current for driving one of the plurality of lighting devices. The illuminance detection module detects a current illuminance value of the target position. The control module can execute a light attenuation compensation mode. When the control module executes the light attenuation compensation mode, the control module compares the initial illuminance value with the current illuminance value to obtain the light attenuation amount, and increases the driving current to increase the current illuminance value to compensate for the light attenuation amount. The above-mentioned light attenuation compensation function can effectively compensate for the light attenuation amount of the lighting device, so that the current illuminance value of the target position can be always kept constant, and the lighting device can meet the requirements of practical applications.

[0050] According to the embodiment of the present invention, the lighting device can detect the current illuminance value of the target position through the external illuminance detection module, and execute the light attenuation compensation mode through the control module. Therefore, even if the light transmittance of the globe of the lighting device is reduced, the above-mentioned light attenuation compensation function can still effectively compensate the light attenuation amount of the lighting device. Therefore, the application of the lighting device can be more extensive and can better meet the requirements of practical applications.

[0051] In addition, according to an embodiment of the present invention, a lighting device includes a plurality of light-emitting modules, and when the driving current exceeds the preset maximum driving current by the control module, the control module can execute a switching mode. When the control module executes the switching mode, the control module switches the driving module to another light-emitting module to drive the light-emitting module. Through the above-mentioned power-saving switching mechanism, the power consumption of the lighting device is not increased by the light attenuation compensation function, so that the lighting device can be more energy-saving and can meet the future development trend.

[0052] In addition, according to an embodiment of the present invention, a lighting device includes a plurality of light-emitting modules, and a control module can execute a switching mode when the driving current exceeds a preset maximum driving current. When the control module executes the switching mode, the control module switches the driving module to another light-emitting module to drive the light-emitting module. The above-mentioned power-saving switching mechanism can not only avoid the increase in power consumption of the lighting device, but also effectively extend the service life of the lighting device.

[0053] According to an embodiment of the present invention, the lighting device can execute the light attenuation compensation mode again after executing the switching mode, so that the current illuminance value of the target position can be always kept constant, and therefore the lighting device can provide a good user experience.

[0054] Furthermore, the design of the lighting device according to the embodiment of the present invention is simple, so that the desired effect can be achieved without significantly increasing the cost.

[0055] Although the above embodiments are described in this specification, it should be noted that they do not limit the scope of the claims of the present invention. Therefore, the changes and modifications to the embodiments described in this specification based on the innovative concept of the present invention, or the replacement of equivalent structures or equivalent processes made using the contents of the specification and drawings of the present invention, and the direct or indirect application of the above technical solutions to other related technical fields are all included in the scope of the claims of the present invention. [Explanation of symbols]

[0056] 1 Lighting equipment 11 Control Module 12 Memory Module 13 Illuminance detection module 14 Drive module 15 Light Emitting Module 16 Communication Module S31 Step S32 Step S33 Step S34 Step S35 Step S36 Step S37 Step

Claims

1. A plurality of light emitting modules; a storage module for storing an initial illuminance value of a preset position when the preset position is at a preset distance from the plurality of light-emitting modules; a driving module that generates a driving current for driving one of the plurality of light emitting modules; an illuminance detection module for detecting a current illuminance value of the target position when the target position is located at the preset distance from the plurality of light-emitting modules; a control module that receives the current illuminance value and executes a light falloff compensation mode; Including, The control module, in the light attenuation compensation mode, compares the initial illuminance value with the current illuminance value to obtain a light attenuation amount, and compensates for the light attenuation amount by increasing the driving current to increase the current illuminance value until the current illuminance value is equal to the initial illuminance value; The memory module further stores a preset maximum drive current of each of the light-emitting modules, and the control module enters a switching mode when the drive current exceeds the preset maximum drive current, and switches the drive module to another of the light-emitting modules in the switching mode.

2. The lighting device with light falloff compensation function according to claim 1 , wherein the control module periodically executes the light falloff compensation mode.

3. The lighting device with light falloff compensation function according to claim 1 , wherein the control module executes the light falloff compensation mode again after executing the switching mode.

4. The lighting device with light falloff compensation function according to claim 1 , further comprising a communication module for receiving the current illuminance value and transmitting it to the control module.

5. When the preset position is located at a preset distance from the plurality of light-emitting modules, storing an initial illuminance value of the preset position by a storage module; generating a driving current for driving one of the plurality of light emitting modules by a driving module; When the target position is located at the preset distance from the plurality of light-emitting modules, detecting a current illuminance value of the target position by an illuminance detection module; receiving the current illuminance value by a control module, executing a light attenuation compensation mode, comparing the initial illuminance value and the current illuminance value to obtain a light attenuation amount, and compensating for the light attenuation amount by increasing the driving current to increase the current illuminance value until the current illuminance value is equal to the initial illuminance value; storing a preset maximum driving current of each of the light-emitting modules by the storage module; when the driving current exceeds the preset maximum driving current, entering a switching mode by the control module to switch the driving module to another of the light-emitting modules; 11. A method for compensating for light falloff in a lighting device, comprising:

6. 6. The method for compensating for light falloff in a lighting device according to claim 5, further comprising the step of periodically executing the light falloff compensation mode by the control module.

7. 6. The method for compensating for light falloff in a lighting device according to claim 5, further comprising: executing the light falloff compensation mode again after the switching mode is executed by the control module.

8. receiving the current illuminance value by the control module; performing the light attenuation compensation mode to compare the initial illuminance value and the current illuminance value to obtain the light attenuation; and compensating for the light attenuation by increasing the driving current to increase the current illuminance value until the current illuminance value is equal to the initial illuminance value; 6. The method for compensating for light falloff in a lighting device according to claim 5, further comprising: receiving the current illuminance value by a communication module and sending it to the control module.

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